China officially approved its lunar probe program in 2004, with its first step being the launch of a satellite to orbit the moon.
中国官方在2004年通过了发射月球探测器方案，这是发射探月卫星的第一步。
Japan's first lunar probe has begun to orbit the moon, in what Japanese space officials are calling the largest mission to investigate the moon since the U. S. Apollo program decades ago.
日本发射的第一个月球探测器已开始环绕月球飞行。日本官员称这次飞行是美国几十年前开展“阿波罗”计划之后的最大规模的探月计划。
A method of applying nonlinear program to solve optimal control problem of lunar probe soft landing under finite thrust is studied.
研究了一种应用非线性规化求解有限推力作用下月球探测器软着陆最优控制问题的方法。
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